Conquer the Sierra Buttes.

The Lost Sierra Endurance Race invites participants to conquer the Sierra Buttes in Downieville, California, on July 26, 2025. Runners can choose from three challenging distances: 100K, 50K, and 25K, each offering unique scenic routes through the Sierra Nevada mountains. The 100K features an out-and-back course with multiple aid stations, while the 50K is a point-to-point race starting from Plumas-Eureka State Park.

The 25K is a looped course ideal for those seeking a less demanding experience. The event also includes a post-race BBQ and various community activities, promoting unity and support for local nonprofits. Visit the organization's website for the most recent information.